Alarm-lock.



v No. 758,554. PATENTED APR. 26, 1904.

0. MILLER 51 KUNZINGER.

ALARM LOCK. APPLIOATION rum) 5m. 10, 1903.

10 MODEL.

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UNITED STATES Patented April 26, 1904.

PATENT OFFICE.

ALARM-LOOK.

SPECIFICATION forming part of Letters Patent No. 758,554, dated April 26, 1904.

Application filed January 10, 1903. Serial Nol38,459. [No model.)

alarm-locks, the object of the invention being to cause the ringing of a bell or sounding of an alarm when a key is inserted in the lock and prior to the turning of the key or. the unlocking operation; and a further object is to provide means for setting the alarm and throwing it out of adjustment when desired and to make provision for stopping it at any time from inside the door. I

\Vith these objects in view my invention consists in certain novel features of construction and combinations of parts, which will be hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view of the lock and alarm with the faceplate of the lock removed. Fig. 2 is a transverse section.

A represents the lock-case, 1 the springactuated latch, and 3 the keyway, which latter is preferably of cylindrical form and adapted to turn axially when the key is turned in the usual manner.

B represents the bell, which may be an ordinary spring-bell or an electric bell, as the case may be, it being supported on the case A, and a push-rod 4 is connected with it in such a manner and in position to be actuated to sound the alarm. This push-rod is actuated by the rocker-cam 5, pivoted on a stud 6, and the end 7 of which is beveled to strike the adjacent end of the push-rod 4 to force the latter inward. This rocker-cam is operated by a tumbler 8, extending inward from the collar 9, mounted on the keyway 3. The collar 9 is in position to be engaged by the key when the latter is inserted in the lock, and when so inserted thetumbler 8 by striking the rocker-cam 5 forces the beveled end 7 against the adjacent endof push-rod 4, cansing the latter to move inward and sound the alarm by releasing the bell-clapper in the usual manner, and the alarm continues to sound indefinitely or until the cam-button 10, which is pivotally connected with the rocker cam 5, is pushed in from the inside, as shown in full lines in Fig. 2, which is the normal position of these parts, the dotted lines indicating the position when the alarm is sounded.

To render the alarm inoperative, the bell is simply turned until the push-rod 4 is out of line with the rocker-cam 5, as indicated at 1 in Fig. 1. A stop 11 by striking a shoulder 12 on the case A limits the movement of the push-rod 1 to a position in alinement with the rocker-cam 5. I

It will be observed from the foregoing that while the tumbler 8 operates to engage and rock the rocker-cam 5 in one direction it is disconnected therefrom and independent thereof, so that when the spring 13 forces the collar 9 back to its normal position the rocker-cam 5 is left in the position indicated by dotted lines until the button 10 is forced inward by a person authorized todo it from the inside of the lock. The collar 9 is always held against turning on the keyway 3 by the projections 14 14, operating in grooves 15 15 in the opposite sides of the keyway, thus insuring an accurate position of the tumbler 8 at all times.

Having fully described ourinvention, what we claim as new, and desire to secure by Letters Patent, is

1. In a lock, the combination with a keyway, and a slidable collar therein in the path of the key upon its initial entrance to the lock, of a bell which is caused to sound by the movement of said collar before they look mechanism is reached, the bell capable of movement on its support, whereby it may be thrown at will in or out of operative adjustment.

2. The combination with a lock and alarm,

said alarm having a push-rod, and a rockercam, of a movable tumbler in position to be operated by the key of the lock and when moved thereby adapted to actuate the push rod by causing the rocker-cam to act thereon.

3. The combination with an alarm and lock, of a rocker-cam in position to sound the alarm, means adapted to be actuated by the key to operate the rocker-cam, a sliding push-rod operated thereby and means for returning the rocker-cam to its normal position.

4. The combination with a lock and alarm, of a keyway, a collar having sliding connection therewith and carrying a tumbler, a rocker-cam adapted to be engaged by the tumbler, a push-rod in position to be operated thereby to cause the sounding of the alarm, and means for returning the rocker-cam to its normal position.

5. The combination with a lock, and alarm, the latter having a movable push-rod capable of being moved bodily into two different positions, of a rocker-cam in alinement with said rod when the latter is in its operative position, a tumbler, said tumbler in position to be rocked by a key when inserted in the lock whereby to rock the cam and slide the rod and thereby cause the alarm to sound.

6. The combination with a lock and alarm, of a push-rod connected with the alarm, a

rocker-cam in position to actuate the rod when the cam is rocked, means adapted to be operated by a key when inserted in the lock to cause the cam to rock and actuate the rod and thereby cause the alarm to sound.

7. The combination with a lock and alarm, of a push-rod connected with the alarm, a rocker-cam in position to actuate the rod when the cam is rocked, means adapted to be operated by a key When inserted in the lock to cause the cam to rock and actuate the rod and thereby cause the alarm to sound, and means for causing the cam to resume its normal position.

In testimony whereof we have signed this specification in the presence of two subscribing witnesses.

OTTO MILLER. PHILIP KUNZINGER. Witnesses:

(J. H. HUMPHREYs, C. C. SUFFREN. 

